Get some gaskets 1st.
Make sure they in place/ aligned properly..taped etc.. or gold by a firm hand...then use a paint pen to trace..
That's what you grind to..leaving some red/paint behind in a even line for a every side of each port...then use a file to finish with.
No novice without challenge will ever land a gasket match accurately...so that's what I say you do.
I'll put part 3 up soon. Was looking for more interest still..
